Niall Morris' try helped nudge Leinster ahead after the break and with Nacewa finishing on 11 points, Dave Kearney's touchdown made the game safe.

Aironi have lost 13 straight games in their inaugural Magners League season.

Ahead of the weekend Six Nations game, Leinster were without 11 international stars which meant a debut for Ireland Under-20 back Brendan Macken with Rhys Ruddock captaining the team for the first time.

Sensing Leinster's apparent disorganisation, Aironi upped the pace and should have scored the game's opening try in the 29th minute as Kaine Robertson cut inside instead of opting for the outside as the overlap appeared on.

However, the Italians kept up the pressure and after being held up over the line, former Munster number eight Nick Williams regrouped to barge his way through Ian Madigan to notch a 35th-minute try.

Tebaldi added the conversion and only a terrific tackle by replacement Morris prevented Jaco Erasmus notching a second Aironi try before the interval.

Morris continued his impressive contribution as he ran in a superb try six minutes after the break following Richard Strauss' break and off-load.

Nacewa added the extras as Leinster started the second half in much better fettle compared to their disjointed and lethargic opening-period efforts.

Aironi regrouped to put the hosts under intense pressure before Tebaldi made a hash of a quick tap penalty to avert the danger for the home side.

The Italians did level on 57 minutes as full-back Paolo Buso slotted a superb long-range drop goal but Nacewa nudged Leinster ahead five minutes later with a straightforward penalty.

Kearney's 77th-minute try made the game safe for Leinster despite a late Buso penalty which earned Aironi a bonus point.

Replacements: Pratichetti for Pizarro 70, Travagli for Tebaldi 67, A De Marchi for A De Marchi 62, Ferraro for Santamaria 64, Biagi for Furno 67, Benatti for Erasmus 67. Not Used: Redolfini, Benettinuts

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